Fetch SDCH dictionary as soon as current URL fetch completes...

net/url_request/url_request_http_job.h

Index: net/url_request/url_request_http_job.h
===================================================================
--- net/url_request/url_request_http_job.h	(revision 9302)
+++ net/url_request/url_request_http_job.h	(working copy)
@@ -8,6 +8,7 @@
 #include <string>
 #include <vector>
 
+#include "base/scoped_ptr.h"
 #include "net/base/completion_callback.h"
 #include "net/http/http_request_info.h"
 #include "net/url_request/url_request_job.h"
@@ -80,6 +81,9 @@
 
   bool read_in_progress_;
 
+  // An URL for an SDCH dictionary as suggested in a Get-Dictionary HTTP header.
+  GURL sdch_dictionary_url_;

[Lincoln, 2009/02/17 21:43:50]

Since you're using GURL, you might want to add:
#include "googleurl/src/gurl.h"

+
   // Keep a reference to the url request context to be sure it's not deleted
   // before us.
   scoped_refptr<URLRequestContext> context_;